Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 402
Firj. 227. A core in the hollow coil moves an index arm over a scalegraduated in amperes arrived at by comparison with a Siemenselectro-dynamometer. Should any accident happen to the cir-cuit, this core would drop upon and short circuit the two springsunderneath, which are attached to the two small… … Fig. 228. 382 THE ELECTRIC LIGHT. As the carbons consume they are pushed forward by theloosening of the spiral springs encircling the tubes, the movableshoulders to which one end of the respective springs are attachedbeing allowed to slide in a groove cut in the sides of the tubes.The ends of the…
Electrical engineering
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